Improvement in pumps



UNITED STATES PATENT OFFICE.

ARTHUR MCGARTER, OF NORRISTOWN, PENNSYLVANIA. v

IMPROVEMENT IN PUMPS.

Specification forming part of Letters Patent No. 38,234, dated April 21, 1863.

To all whom t 'may concern Be it known that I, ARTHUR MCCARTER, of Norristown, in the county of Montgomery and State of Pennsylvania, have invented a new and useful Improvement in Pumps; and I do hereby declare that the following is a full,

clear, and exact description of the same, refcrence being had to the accompanying drawings, forming part of this specification, in whichi Figure 1 is a vertical longitudinal section of a double-acting force-pump with my improvement applied to it. Fig. 2 is a vertical transverse section of the same. Fig. 3 is a horizontal section through the valve-chest, showing the arrangement of the ports or passages. Fig. 4 is a perspective view of the valve.

Similar letters of reference in the several figures indicate corresponding parts.

My invention consists in a novel doubleacting slide-valve, in combination with a double-acting pump furnished with ports adapted to the use of such valve in the manner I propose.

In the drawings a cylinder-pump, A, with two pistons, B B', yoked together by a sliding frame, G C, and moved by a lever, D, is shown. This pump has its cylinder divided into two chambers by atransverse diaphragm, a. On each side of the diaphragm two ports or passages, Z1 b', areformed. The respective pairs of ports are arranged so that those of each pair intersect one another where they terminate on the inner circumference of the cylinder A, as shown. In the top of the diaphragm a there is formed an induction-port, c. This port leads incliiiing through one side of the valve-seatrE of the cylinder A, and terminates in a screw-box, d, into which box the well-pipe F is screwed, as shown. That part of the valve-seat on which the valve slides is elevated slightly above the outer lmargin of the seat, aslshown at e. The valvechest Gr is of rectangular form on its interior, and all its sides therein are perpendicular to the plane of the seat. The exterior of the valve at its ends is curving or bulging, and within these bulging portions channels or ports f g are formed, these poi-ts leading up from the base of the chest to about half the depth of the sides,l and then leading on a curve into the chest, as shown.

Within the box or square chamber of the chest Gr an angular or three-faced valve, H, is placed. This valve has two vertical sides or faces, g g', and a horizontal face, h. This latter face is formed with a chamber of circular form, as indicated at z. The vertical sides or faces of the valve are of less depth than the sides of the chest, so that a space, jj, shall be left between them and the top plate of the chest when the pump is put together. The faces g' g of the valve are packed so as to Work water-tight alternately. Packing may also be placed around the seat, as at lc. In a word, the parts of the pump throughout, which require to work at times water-tight, should be fitted to that end. In the cap-plate of the chest G an air-chamber, I, with a dischargepipe, J, is fitted. Any other discharge arrangement may be adopted accordingly, as

circumstances may require. So, also, may the construction and manner of operating those portions of the pump which are well known be varied to suit demands. Gare, however, must be had to always retain the respective ports and the valve with three working-faces, substantially as shown 5 and,in order to insure the continuous flow of the water with the use of the one valve, sufficient lap should be given to it to close one side of the pump and open the other with a short stroke of the pistons.

The great utility of my invention lies in this-to wit, adapting a single valve to take the place of several independent valves, and have it perform, in a practical and effectual manner, the offices of the same, thus saving expense of construction and obviating the difficulties experienced from the several valves heretofore used getting out of working condition.

The operation is as follows: When the' water has been introduced into the cylinder, that which is forced out takes the course of the arrows l l, and by its pressure moves the valve to the position shown in black. The iniiowing water during this action takes the course of the arrows 2 2. A reverse motion of the pistons causes the water last taken in to take the course of the arrows 3 3. This water moves the valve to the position shown in red. The inilowing water during this action takes the course of the arrows 41.- 4. The

2. The threefaced valve, in combination with the ve ports, substantially as described.

Witness my hand this 28th day of January, 1863, in the matter of my application for a patent on improved pump.

ARTHUR MCGARTER.

Witnesses RoBT. FENWICK, GUsTAVE DIETERICH. 

